Enhanced Ultraviolet Luminescence of ZnO Nanorods Treated by High-Pressure Water Vapor Annealing (HWA)

被引：19

作者：

Al-Nafiey, Amer ^{[1
,2
]}

Sieber, Brigitte ^{[2
]}

Gelloz, Bernard ^{[3
]}

Addad, Ahmed ^{[2
]}

Moreau, Myriam ^{[4
]}

Barjon, Julien ^{[5
]}

Girleanu, Maria ^{[6
]}

Ersen, Ovidiu ^{[6
]}

Boukherroub, Rabah ^{[1
]}

机构：

[1] Univ Lille 1 Sci & Technol, UMR CNRS 8520, IEMN, Ave Poincare,BP 60069, F-59652 Villeneuve Dascq, France

[2] Univ Lille 1 Sci & Technol, UMR CNRS 8207, UMET, F-59655 Villeneuve Dascq, France

[3] Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan

[4] Univ Lille 1 Sci & Technol, LASIR, UMR CNRS 8516, F-59655 Villeneuve Dascq, France

[5] Univ Versailles St Quentin, UMR CNRS 8635, Grp Etud Mat Condensee GEMaC, F-78035 Versailles, France

[6] Inst Phys & Chim Mat Strasbourg, IPCMS UMR CNRS 7504, 23 Rue Loess,BP 43, F-67034 Strasbourg, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2016年 / 120卷 / 08期

关键词：

THIN-FILMS; GREEN LUMINESCENCE; SIO2; PROPERTIES; NANOSTRUCTURES; PHOTOLUMINESCENCE; IMPROVEMENT; GROWTH; CATHODOLUMINESCENCE; EMISSION; SURFACES;

D O I：

10.1021/acs.jpcc.5b09201

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Zinc oxide nanorods (ZnO NRs), synthesized by a low temperature chemical method, were postannealed at 260 degrees C in air and under high pressure water vapor (HWA) at 1.3-3.9 MPa. We found that the UV luminescence intensity increased by a factor of 2-3 after HWA annealing compared to that observed after annealing in air. Structural analysis of the nanorods in relation with their optical properties by means of Raman and XPS spectroscopies, transmission and scanning electron microscopies allow to conclude that the origin of the UV luminescence enhancement is due to the transformation of the Zn(OH)(2) surface-layer into ZnO, but also to the growth of a new thin ZnO layer at the surface of the rods. This layer is 1-2 rim thick and its presence leads to surface reconstruction of the nanorods. In addition, we show that the size and the density of the nanopores within the ZnO NRs are reduced upon HWA annealing with respect to air annealing.

引用

页码：4571 / 4580

页数：10

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